Electrical component, tube, and tube-holder-shield combination



Dec. 21, 1965 T. E. HANDING 3,225,259

ELECTRICAL COMPONENT, TUBE, AND TUBE-HOLDER-SHIELD COMBINATION FiledOct. 19, 1964 v //7 T i! Inn INVENTOR. THEODORE E HA/VDl/VG UnitedStates Patent 3,225,259 ELECTRICAL COMPONENT, TUBE, AND TUBE-HOLDER-SHIELD COMBINATION Theodore E. Handing, Chicago, Ill., assignorto Amplifone Corporation, Chicago, 11]., a corporation of Illinois FiledOct. 19, 1964, Ser. No. 404,825 3 Claims. (Cl. 31799) This inventionrelates to high-voltage, tube-holdershield elements for certain types ofelectrically-operated equipment.

In certain types of electrically-operated equipment, using high-voltagetubes adjacent electrical components, it is necessary to shield thetube. Heretof ore tubes were normally mounted in a tube socket securedto a base in the television set, this takes up additional space. Thepresent invention was conceived to eliminate this defect and to placethe tube and its shield directly to the electric component such as forinstance, a flyback.

The .main objects of this invention are; to provide an improved form ofcombination tube-holder-shield element; to provide an improvedcombination tube-holdershield element of this kind structured from flameretardent, high-dielectric strength material; to provide a tube holderof this kind which may be positioned and made part of a flyback unit;and to provide an improved combination tube-holder-shield element ofthis kind of such simple construction as to make very inexpensive itsmanufacture and extremely facilitate its installation and use in thecircuitry for such equipment.

In the adaptation shown in the accompanying drawings:

FIGURE 1 is a plan view of a combination tube-holdershield element,constructed in accordance with this invention, as part of an electricalcomponent commonly referred to as a flyback coil,

FIG. 2 is a side elevational view of the device;

FIG. 3 is a transverse sectional view of the element, taken on the planeof the line 3-3 of FIG. 2;

FIG. 4 is a perspective view of the preferred form of such a combinationtube-holder-shield element constructed in accordance with thisinvention;

FIG. 5 is a transverse, cross-sectional view similar to FIG. 3 butshowing a strip of metal foil interposed between a tube and the element;and

FIG. 6 is a perspective view of a modified form of such a combinationtube-holder-shield element.

The essential concept of this invention involves a cylindrical elementformed of flame retardent, high dielectric strength material forembracement of the tube and having an exteriorly-integrated rib formounting the element on a suitable electric component to form a partthereof.

A combination tube-holder-shield element, for use with an electricalcomponent 7, embodying the foregoing concept comprises either alongitudinally-slotted cylindricaltype element 8 or a completecylindrical element 9 having an integrated rib 10 for attachment of theelement to a suitable support.

The electrical component 7, herein shown, represents a type for use withwhich this combination tube-holdershield element has been particularlydesigned. It is a type commonly known as a flyback. However it is to beunderstood that this device may be used in connection with otherelectrical components. As here shown, this component 7 comprises a pairof annular coils 11 and 11 mounted on one leg 12 of an O-shapedarmature. On opposed legs 13 a conventional terminal plate 14 is securedand the device of the present invention 8 respective- 3,225,259 PatentedDec. 21, 1965 ly as shown. Attached to and leading from the coil 11 arewires 16 attached to a conventional connector cap 17 for setting over astem on the end of the tube T, which is to be frictionally embracedwithin either the slotted type element 8 or the full cylindrical element9.

Either of these elements 8 or 9 is structured from a flame-retardentmaterial of high dielectric strength. One such material, suitable forthis purpose, is polypropylene. The material is molded into tubes ofconvenient lengths and requisite diameters and subsequently cut intosuitable lengths to form the elements 8 and 9 for use with particularelectrical components 7. The element 8 has a longitudinal portion cutout to form a gap or slot 18, disposed axially of the element, as shownin all the figures except FIGURE 6. When so slotted, the element,although very stable by virtue of the nature of the polypropylene, issomewhat flexible so that a tube T may be pressed into the element 8radially through the gap or slot 18, and likewise removed from theelement 8.

The rib 10 is herein shown to be of T shape crosssection, of a thicknesssomewhat greater than the thickness of the elements 8 and 9, and of alength slightly less than the elements themselves. Obviously, this rib10 could be structured from the same material as the elements 8 and 9 orfrom some other non-conductive substance. Other forms of such a rib 10could be used than that herein indicated. For example, the transversepart of a T-sha-pe rib could be of arcuate contour of the same diameteras the element 8 or 9 so as to partially embrace the respective element.The stem part of the rib could be disposed radially outward eithertransversely to or parallel with the axis of the element.

The integrating of a separately-formed rib 10 with the element 8 or 9may be effected by the use of any of the conventional adhesives. Or therib 10 could be molded as an integral part of the element.

It should be obvious that if the tubes need further shielding theinterior of the elements 8 or 9 may be lined with a thin sheet of metalfoil 19, as shown in FIG. 5.

Normally the opposed legs 12 are provided with longitudinal grooves ontheir outer surfaces for seating the usual bolts 22 for securing theterminal plate to the flyback unit. These same bolts are employed toanchor the shield element 8 or 9 to the unit as shown through theapertures 23 one of which is in the form of a slot to compensate for anylateral adjustment required.

The tube T is provided with its usual prongs or terminals 21 to which isconnected the cables 20 and the other normal cables (not shown) andrequired in the circuitry of a television set.

It should now be obvious that the development of this invention helps insolving the problem of decreasing the size of television receivers whichproblem has been sought for a long time in this industry.

It is to be understood that details of the construction shown may bealtered or omitted without departing from the spirit of this inventionas defined by the following claims.

I claim:

1. A combination of a terminal plate, a supporting leg secured to theplate in axial disposition thereto, an electrical component embracivelypositioned on the leg, a tube-supporting element of flame-retardentmaterial of high dielectric strength, a rib of the same material as thesupporting element fixed exteriorly on and extending radially outwardfrom the element, the rib being attached to the leg, and a tubefrictionally embraced within the supporting element.

2. A combination as set forth in claim 1 wherein the 2,979,554 4/1961Maitland 1745'2 X attachment of the rib to the leg disposes the elementin 3,042,736 7/1962 Salisbury 1745 spaced parallel relationship to theplate. 3,087,982 4/ 1963 Hayes 1'74-35 X 3. A combination as set forthin claim 2 wherein the 3,154,281 10/1964 Frank. tube-supporting elementhas a slot extending the full 5 length of the element and of a widthless than the diameter FOREIGN PATENTS f the element 1,167,605 8/1958France.

505,013 5/ 1939 Great Britain. References Cited by the Examiner 792,2663/1958 Great Britain. 5 3 PATENTS 1 4 5 ROBERTK. SCHAEFER,Pri11mryExaminer. 2,20 ,09 6 4 ons 7- 2,809,004 10/1957 Kaufman et al I LARAMIEE. ASKIN, Assistant Examiner.

2,960,561 11/1960 Plummer 17436

1. A COMBINATION OF A TERMINAL PLATE, A SUPPORTING LEG SECURED TO THEPLATE IN AXIAL DISPOSITION THERETO, AN ELECTRICAL COMPONENT EMBRACIVELYPOSITIONED ON THE LEG, A TUBE-SUPPORTING ELEMENT OF FLAME-RETARDENTMATERIAL OF HIGH DIELECTRIC STRENGTH, A RIB OF THE SAME MATERIAL AS THESUPPORTING ELEMENT FIXED EXTERIORLY ON AND EXTENDING RADIALLY OUTWARDFROM THEN ELEMENT, THE RIB BEING ATTACHED TO THE LEG, AND A TUBEFRICTIONALLY EMBRACED WITHIN THE SUPPORTING ELEMENT.